K担持炭を物理混合した石炭の流動層接触ガス化 (化石エネルギ-利用技術<特集>) -- (石炭ガス化)

概要

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Potassium-loaded Yallourn brown coal was prepared with KCl using an ion-exchange technique. The K-loaded brown coal char was physically mixed with a higher rank coal char, Liddell coal, in a fluidized bed and the mixture was gasified in carbon dioxide (0.1 MPa) with the fluidized bed at 750°C. Potassium catalyst incorporated into Yallourn coal not only significantly enhanced the reactivity of Yallourn coal char, it also did so for Liddell coal char. It was found that potassium compound easily transfer from K-loaded coal char to unloaded coal char by collision in the fluidized bed. The catalytic effectiveness on the gasification of Liddell coal char was dependent on the particle size. The intimate direct contact between K-exchanged coal char and higher rank coal char was very important for this catalytic coal gasification system. The partial deactivation of potassium catalyst due to reaction with mineral matter in Liddell coal was observed.
社団法人化学工学会の論文